[dscott]

John, That engine does have the stock heads but the valves have been replaced with the 1.94 intake and the 1.6 exhaust. They were also pocket ported and port matched to the intake. I don't recall the dyno numbers but I know it was somewhere around the 325 to 350 range. It sounds like maybe you have a fuel problem with the injection. It should have made better power at the rear wheels. I don't know if you would gain much going to the performer heads. They do flow a little better but the intake and exhaust valves are the same size. If you had room a different intake would improve it. You may also want to try a good carburetor and see if any improvement is gained. I haven't had very good luck with the Holley system on the dyno.
Don